Article

Is knee laxity change after ACL injury and surgery related to open kinetic chain knee extensor training load?

Division of Applied Biomedical Research, GKT School of Biomedical Sciences, King's College London, Shepherd's House, Guy's Campus, London, United Kingdom.
American journal of physical medicine & rehabilitation / Association of Academic Physiatrists (impact factor: 1.56). 06/2009; 88(5):369-75. DOI:10.1097/PHM.0b013e3181a0d7ed pp.369-75
Source: PubMed

ABSTRACT The purpose of this study was to evaluate whether knee anterior laxity changes after anterior cruciate ligament injury and surgery are related to aspects of thigh muscle resistance training during rehabilitation.
Forty-nine subjects (13 females) diagnosed with an anterior cruciate ligament-deficient knee or who had undergone anterior cruciate ligament reconstructive surgery participated in this study. The subjects trained their knee extensors in the open kinetic chain during a 6-wk program, and the relationship of aspects of training (for example, absolute resistance load) and other factors to anterior laxity change during this period were analyzed using linear regression analysis.
The only factor found to be significantly related (r = -0.347) to anterior knee laxity change was average absolute load used in training the knee extensors.
These results offer some early clinical support for increasing the strain on the anterior cruciate ligament graft (in patients treated with reconstruction) or other passive restraints to anterior tibial displacement, during rehabilitation after anterior cruciate ligament injury and reconstruction surgery to promote decreased knee anterior laxity.

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Keywords

6-wk program
 
absolute resistance load
 
anterior cruciate ligament graft
 
anterior cruciate ligament injury
 
anterior cruciate ligament reconstructive surgery
 
anterior cruciate ligament-deficient knee
 
anterior knee laxity change
 
anterior laxity change
 
anterior tibial displacement
 
aspects
 
factors
 
knee anterior laxity
 
knee anterior laxity changes
 
knee extensors
 
linear regression analysis
 
open kinetic chain
 
reconstruction surgery
 
results offer
 
thigh muscle resistance training